用python中的turtle库绘制一个好看的图案
程序中必须包含流程控制（循环）、组合数据类型（列表、元组、集合、字典）、自定义函数内容。代码不少于30行
from turtle import Screen, Turtle, mainloop
from time import perf_counter as clock, sleep
def mn_eck(p, ne,sz):
turtlelist = [p]
#create ne-1 additional turtles
for i in range(1,ne):
q = p.clone()
q.rt(360.0/ne)
turtlelist.append(q)
p = q
for i in range(ne):
c = abs(ne/2.0-i)/(ne*.7)
# let those ne turtles make a step
# in parallel:
for t in turtlelist:
t.rt(360./ne)
t.pencolor(1-c,0,c)
t.fd(sz)
def main():
s = Screen()
s.bgcolor("black")
p=Turtle()
p.speed(0)
p.hideturtle()
p.pencolor("red")
p.pensize(3)
s.tracer(36,0)
at = clock()
mn_eck(p, 36, 19)
et = clock()
z1 = et-at
sleep(1)
at = clock()
while any(t.undobufferentries() for t in s.turtles()):
for t in s.turtles():
t.undo()
et = clock()
return "runtime: %.3f sec" % (z1+et-at)
if __name__ == '__main__':
msg = main()
print(msg)
mainloop()